--- a/src/linetypes/modelobject.h Fri Mar 23 21:53:03 2018 +0200 +++ b/src/linetypes/modelobject.h Fri Mar 23 22:00:34 2018 +0200 @@ -24,6 +24,7 @@ class Model; class LDDocument; class DocumentManager; +struct LDPolygon; /* * Object type codes.